verilog实现高斯拟合代码
时间: 2023-12-31 09:07:13 浏览: 18
下面是一个简单的Verilog代码实现高斯拟合:
module gaussian_fit(input clk, input reset_n, input signed [31:0] x, input signed [31:0] y, output reg signed [31:0] a, output reg signed [31:0] b, output reg signed [31:0] c, output reg [31:0] error);
// 初始化参数
reg signed [31:0] sum_x;
reg signed [31:0] sum_y;
reg signed [63:0] sum_x2;
reg signed [63:0] sum_xy;
reg [7:0] count;
reg done;
// 计算过程
always @(posedge clk) begin
if (reset_n == 0) begin
sum_x <= 0;
sum_y <= 0;
sum_x2 <= 0;
sum_xy <= 0;
count <= 0;
done <= 0;
error <= 0;
end else begin
if (!done) begin
sum_x <= sum_x + x;
sum_y <= sum_y + y;
sum_x2 <= sum_x2 + x * x;
sum_xy <= sum_xy + x * y;
count <= count + 1;
if (count == 256) begin
// 计算高斯拟合参数
if (sum_x2 * count - sum_x * sum_x == 0) begin
error <= 0;
end else begin
a <= (sum_xy * count - sum_x * sum_y) / (sum_x2 * count - sum_x * sum_x);
b <= (sum_y - a * sum_x) / count;
c <= sum_x2 * count / (sum_x2 * count - sum_x * sum_x);
error <= ((sum_y - a * sum_x - b) ** 2) / count;
end
done <= 1;
end
end
end
end
endmodule
这个代码使用一个计数器来累加输入的x和y值,当计数器达到256时,计算高斯拟合参数a、b和c,并计算误差。这个代码的主要限制是计数器大小,它限制了输入样本数的最大值。如果需要更高的精度或更大的输入样本数,需要使用更复杂的算法或更大的存储器来实现。